Transmission



J. KOCHIS TRANSMISSION 5 Sheets-Sheet 1 Aug. 23, 1949.

Filed March 128, 1946 Inventor 5 Attgmeys N KOCH/5.

iz and J. KOCHIS TRANSMISS ION Aug. 23, 1949.

3 Sheets-Sheet 3 Filed March 28, 1946 Inventor i JOHN KOCH/5.

By 2 and Patented Aug. 23, 1949 UNITED STATES PATENT OFFICE TRANSMISSION v mm Kocliis, Staten Island, N. Y.

Application March 28, 1946, Serial No. 657,778

1 Claim.

This invention relates to a transmission and more particularly to a power transmission.

The primary object of the invention is to establish between a driven shaft and a drive shaft, a driving connection having an infinite number of speeds within the limits of the device.

Another object is automatically to govern the speed of rotation of the driven shaft according to the load applied thereto, and automatically to regulate th torque applied to the driven shaft to overcome the effects of the load thereon.

Among its features my invention embodies a drive shaft. a driven shaft, a spider mounted on and driven in unison with each shaft, planetary pinions carried by each spider, gears rotatably mounted on each shaft on each side of each spider, said gears meshing with the planetary pinions,'a pinion on each shaft rotatable in unison with one of the gears on each side of each spider and a gear on each shaft on each side of each spider rotatable in unison with a gear meshing with the planetary pinions and having meshing engagement with the pinion on the other shaft.

Other features include braking means operative automatically to retard or arrest rotation of one of the last-mentioned gears.

In the drawings: v

Figure l is a rear view of a transmission embodying the features of this invention, certain portions of the casing being broken away to more clearly illustrate certain features of the construction.

Figure 2 is a vertical sectional view through Figure 1.

Figure 3 is an enlarged sectional view taken substantially on the line 3-3 of Figure 1,

Figure 4 is a sectional view taken substantially along the line 4-4 of Figure 2, and

Figure 5 is a transverse sectional view taken substantially along the line 5-3 of Figure 2.

Referring to the drawings in detail my improved transmission is housed within a casing it in which a drive shaft H is mounted to rotate. A driven shaft i2 is rotatably mounted in the casing ill in spaced parallel relation to the shaft H and splined as at II to the shaft H is a spider l4 carrying radial arms up on which bevelled pinions II are mounted to rotate. Splined as at It to the shaft i2 is a spider I! having radial arms upon each of which is rotatably mounted a bevelled pinion l3, and these spiders are arranged to operate in aligned planes perpendicular to their respective shafts II and I2.

Rotatably mounted on the shaft H on one side of m spider is is a bevelled gear ll which has 56 additional braking means on the gears i9 and 23 meshing engagement with the pinions l5, and carried by the hub of the gear ill for rotation in unison therewith is a spur pinion 20. A bevelled gear 2| is rotatably supported on the shaft i2 in alignment with the bevelled gear [9 and has meshing engagement with the bevelled pinions l8 as will be readily understood upon reference to Figures 2 and 3. The hub of the gear 2| carries a spur gear 22 which is rotatable in unison with the gear 2| and has meshing engagement with the spur pinion 20 previously referred to. It will thus be seen that when rotation of the pinions I5 is retarded or arrested the gear ill will be driven in unison with the drive shaft I i so as to transmit power to the gear 22 through the medium of the pinion 20, thus causing the shaft I2 to rotate. Rotatably mounted on the side of the spider l5 opposite the bevelled gear 19 is a bevelled gear 23 which has meshing engagement with the pinions l5 and is provided with an elongated hub 24 carrying a spur gear 25 which rotates in unison with the bevelled gear 23. As will be readily understood upon reference to Figure 3 the hub 24 extends through the end wall of the housing l0 and enters an hydraulic chamber to be more fully hereinafter described. A bevelled gear 26 is rotatably mounted on the shaft i2 on the side of the spider ll opposite the gear 2| and has meshing engagement with the pinions IS. The hub of the gear 26 is provided with a spur pinion 2'! which has meshing engagement with the spur gear 25 as will be readily understood upon reference to Figures 2 and 3. It will thus be seen that as the shaft I I is driven and a load is applied to the shaft l2 power will be transmitted from the shaft Ii to the spider I4 and thence through the pinions l5 to the bevelled gears l9 and 23 with the result that driving energy will be transmitted through the pinion 2!], gear 22 and gear 2! to the pinions II to cause the spider I! to turn and drive the shaft l2. Due to the retarding action of the gear 26 to the rotation of the pinions l8 by reason of its meshing engagement with the gear 25 it will be apparent that the gear 23 will be retarded and consequently considerable torque will be applied to the shaft i2 to move the load. As the momentum of the load increases, the speed of rotation of the shaft l2 will increase, thus offering less resistance to rotation of the gear 23 and cansing the speed of the shafts Ii and i2 to more nearly approach one another.

While the transmission will function as above described I have found it desirable to employ and to this end I employ the hydraulic mechanism to be more fully hereinafter described.

' Attached to the case I is a casing 28 into which the hub 24 of the gear 23 projects about the shaft II. The case 28 is adapted to contain hydraulic fluid, and keyed .or otherwise secured to the hub 24 within the case 28 is a vaned rotor 29 carrying radial vanes 30. Rotatably mounted on the shaft I I within a housing 3| on the side of the housing 28 opposite the housing i0 is a spur gear 32 the hub 33 of which extends into the housing 28 and keyed or .otherwise secured thereto as at 34 is an impeller 35 having radial vanes 36.

Keyed or otherwise secured as at 31 to the shaft H is a spider 38 carrying studs 39 on which pinions 40 are rotatably mounted. These pinions mesh with the spur gear 32 and also with an internal ring gear 4| which is fixed to the housing 3| as illustrated in Figure 3. It will thus be seen that as the shaft H is rotated the spider 38 will rotate in unison therewith and cause the pinions 40 to move in an orbit concentrically about the axis of the shaft ii. Due to their meshing engagement with the internal ring gear 4| it will be obvious that the pinions 32 will be rotated so as to drive the impeller 35 at a speed greater than the speed of rotation of the shaft H, it being understood that the gear trains 32, 4B and M are so designed as to cause the impeller 35 to rotate at such speed. Rotation of the impeller 35 will tend to rotate the rotor 29 and hence the gears 25 and 23 in the direction of rotation of the shaft. Since acceleration .of gears 25 and 23 makes the pinions i tend to rotate gear l9 in a direction reverse to the direction of rotation of the shaft II it will be obvious that a braking effect will be produced .on the gear l9, thus imparting a relatively high speed of rotation to the gear 23 and pinion 25 so as to drive the pinion 21 at increased speed and hence transmit the power through the pinions l8 and spider H to the shaft l2. Obviously as the speed of the shaft l2 approaches that of the shaft H, the transition will take place smoothly and without jerk or jolt. It is also obvious that an infinite number of speed ratios may be had between the shafts i I and i2 and that the torque applied to driven shaft l2 will be inverse to the speed of rotation thereof.

While in the foregoing there'has been shown 5 and described the preferred embodiment of this invention it is to be understood that minor changes in the details of construction, combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

What I claim is:

In a transmission a drive shaft, a driven shaft, a spider mounted on and driven in unison with each shaft, planetary pinions carried by each spider, gears rotatably mounted on each shaft on .each side of each spider, said gears meshing with said planetary pinions, a pinion on each shaft rotatable in unison with one of the gears which meshes with said planetary pinions, a

JOHN KOCHIS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,039,879 Armstrong Oct. 1, 1912 2,181,118 Burner Nov. 28, 1939 2,360,259 Murray Oct. 10, 1944 relatively large gear on each shaft, said large 

